Why is it that pretty much all forms of race hatred are tolerated by governments to a greater or lesser extent...except for Anti-Semitism?

@Waveney = Remember, belief in a Jew will result in you getting eternal life. Gotta stay on his good side.

It’s not tolerated in iran?

Because of the already completed result of it LAST TIME.

You've got it backwards. Speaking for the US, any politician who openly recommended overt discrimination against any racial or religious group would find themselves speaking to a small minority. But antisemitism is fine as long as it's expressed as "antizionism."